# Prep Clock vs To

The clearest difference is update cadence: Prep Clock at every 5 days against To's monthly. Prep Clock also leads on iOS requirement (18.0 vs 26). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Prep Clock sells 2 in-app purchases, starting at $2.99 per month and To sells 1 in-app purchase, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

Prep Clock ships an update every 5 days, To monthly. Both last shipped on October 11, 2026.

## The numbers

| Metric | Prep Clock | To |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 17 MB | 125 MB |
| Requires iOS | **18.0** | 26 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Tinklepaugh](https://appshunter.io/developer/1883444651) | [Kay Krause-Burghardt](https://appshunter.io/developer/1896715794) |

## What reviewers say

### Prep Clock

[App page](https://appshunter.io/ios/app/prep-clock-backward-timer/id6760279596)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Annual | $19.99 | per year |


### To

[App page](https://appshunter.io/ios/app/to-do-list-by-energy-merevi/id6772743023)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Prep Clock free?

Prep Clock is free to download, with in-app purchases available.

### Is To free?

To is free to download, with in-app purchases available.

### Do Prep Clock or To have ads?

Neither Prep Clock nor To shows ads.

### Which is updated more often, Prep Clock or To?

Prep Clock ships an update every 5 days, and To monthly. Most recently, Prep Clock was updated on October 11, 2026 and To on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*